I take it that you have not shot short range group benchrest in sanctioned matches. No problem, you have a lot of company. Assuming that, there is so much to learn to become competitive in the sport it is almost impossible to get there with out some mentoring from an experienced and proficient shooter. The reason that I bring this up is that it seems like a lot of online discussions gloss over everything but the caliber, possibly what bullet, and what barrel. There is a LOT more to it. IMO as long as the caliber you are shooting is good enough not to be what keeps you from doing well you have a lot to choose from, but on the off chance that you get really good at staying in razor sharp tune in spite of changes in ambient conditions, learns to read wind flags exceptionally well, and have the whole bag rest how to handle the rifle and when to start a group things down cold, then the list gets a lot shorter, and even then the discussions are likely to revolve around group size rather than agg. size. The guys that I listen to and watch closely win big matches. I suggest that you might want to do the same, and not waste their time telling them what you think, until you are in their league. Listen and copy. IMO their results speak for themselves. I will wind this up by thanking those who win matches for their time on this forum. It is appreciated. This is not to say that I am at all opposed to experimentation of any sort, if it is done for its own sake. Actually I have done a fair amount of that, and will continue to encourage it in others, but if your goal is to do well in competition, wandering off that way can slow your progress.